Might be useful as data for modeling but its really just a quantification of common sense. Yes, high speed air is going to push objects apart. Calling it "surfing" is a bit disingenuous. The object don't maintain a fixed separation.

The problem of separating objects at supersonic speeds isn't getting them to part, its getting them to part cleanly. Aerodynamic forces can sometimes do weird things. Its something aircraft and munitions designers spend a lot of testing time on.

Here's a little old school hypersonic "surfing". It was called the IMP Glider. It was an inflated re-entry glider. It did a mach 8 re-entry from a sounding rocket in 1964. We commission flowmetrics to do a new flow study on the vehicle for us. It flew all the way to the ground, no heat shield.